Most red cards in K-League Classic 2021
Red cards
| Red cards | MP | Coef. | ||
|---|---|---|---|---|
|
Jun Lee 
Pohang Steelers
|
1 | 3 | 0.33 |
|
Alex Grant
Pohang Steelers
|
1 | 2 | 0.50 |
|
Sang-Hoon Paik 
FC Seoul
|
1 | 1 | 1.00 |